/*
 * Copyright 2002-2024 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.security.web.server.authentication;

import reactor.core.publisher.Mono;

import org.springframework.security.web.authentication.session.SessionAuthenticationException;

/**
 * Returns a {@link Mono} that terminates with {@link SessionAuthenticationException} when
 * the maximum number of sessions for a user has been reached.
 *
 * @author Marcus da Coregio
 * @since 6.3
 */
public final class PreventLoginServerMaximumSessionsExceededHandler implements ServerMaximumSessionsExceededHandler {

	@Override
	public Mono<Void> handle(MaximumSessionsContext context) {
		return context.getCurrentSession()
			.invalidate()
			.then(Mono.defer(() -> Mono.error(new SessionAuthenticationException("Maximum sessions exceeded"))));
	}

}
